<?php
    define('DB_HOST','localhost');
    define('DB_USER','root');
    define('DB_PASS','');
    define('DB_NAME','review_app');
    $conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
    if($conn->connect_error) {
        die("连接失败".$conn->connect_error);
    }
    echo "连接成功!";
